The LSN180HSV4 is a singlezone air handler and requires the LG LSU180HSV4 condenser to operate. The LSN180HSV4 is the indoor unit only; outdoor units are sold separately and are required to run this model. The LG LSN180HSV4 is an air handler unit for a ductless split air conditioning system. It provides reliable cooling for a single zone/room. This LG air handler has an 18,000 BTU cooling capacity. It is energy efficient with a SEER rating of 20. 5. This LG ductless heat pump air conditioner features a wall mounted installation. Because it's wall mounted, this unit was designed to be aesthetically pleasing as well as effective. It comes standard with a remote for easy temperature control and changing automatic settings.